Hydraulic press.



No. 876,8 21. PATENTED'JAN.14,1908. T. H. MAPP.

HYDRAULIC PRESS. APPLICATION FILED AUG. 6, 1906.

Wz'inesss A 0., WASHINGTON, n. c.

'UNTTED- STATES PATENT OFFICE.

THOMAS HENRY MAPP, OF SURRY HILLS, NEAR SYDNEY, NEW SOUTH WALES,AUSTRALIA.

HYDRAULIC 'PRE SS.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed August 6, 1906- Serial No. 329.465.

To all whom it may concern:

Be it known that I, THOMAS HENRY MAPP, a subject of the King of GreatBritain, residing at 382 Bourke street, Surry Hills,

near Sydney, State of New South Wales, Australia, have invented certainnew and useful Improvements in Hydraulic Presses, of which the followingis a specification.

This invention relates to improvements in hydraulic presses in which thematerial to be compressed is fed into a bottom box and is then forcedupwardly into an upper box where the compression takes place.

The object of the invention is to simplify the construction and workingof such presses.

According to my invention the top box is movable vertically on the headof the press by means of two double acting plungers Which raise andlower said box and also prevent its shifting when the ram acts tocompress the material against the head of the press.

Referring to the accompanying drawings,

Figure 1 is a perspective view illustrating my improvements. Fig. 2 is apartial sectional elevation, and, Fig. 3 is a sectional plan on line 3-3Fig. 2. c

On the base 4 are columns 5 supporting the top plate 6 carrying the head7 of the press. The head has a feed opening 8 provided with a slide 9 toopen and close same. On the head 7 also slides vertically the top box 10which is secured to the piston rods 11 operated by the plungers in thedouble acting cylinders 12 the latter having the branched supply pipes13 and 14. The piston rods have guides in the brackets 15 Which arebolted to the columns 5, the cylin- 4 ders being secured to the base 4by means of bolts 16. Resting on the base 4 is the main cylinder 17 withits ram 18 and supply pipe 19. The head 20 of the ram slides within anopen ended bottom box 21 which is supported to the cylinders 12 and tothe brackets 15 by bolts 22.

In operating a press fitted with my improvements the top box 10 israised to its highest position by the piston rods 11 being forced up bywater entering the cylinders 12 through the pipes 14 thereby allowingthe slides 9 to be withdrawn as shown in Fig. 1. While the ram head 20stands at its lowermost position, the material to be compressed-is fedthrough the opening 8 and falls into the bottom box 21. On there beingsuificient material in the bottom box to form a block of the desiredsize, the slide 9 is pushed in so that the handle'is flush with theside. Water is now passed through the pipes 13 to depress the pistonrods 11 therebylowering and retaining top box 10 in position on thebottom box 21, while the ram 18 compresses the material into a block 23(Fig. 2) which is held together by means of clamps passing through theslots 24. e

As usual plates are placed immediately belowand above the materialbefore compression.

To remove the block the water in the upper ends of the cylinders 12 isallowed to discharge and water is passed in to the lower ends throughpipes 14 thereby raising the piston rods and lifting the box 10 clear.of the bottom box and compressed block which can now be removed whenthe press is ready for another charge. It is evident that the pipes 13and 14 may act both for the supply and discharge of the water from thecylinder 12.

Having now described my invention what I claim as new and desire tosecure by Letters Patent is 1. In a hydraulic press, the combination ofa press head, a top box vertically movable on the head, a fixed bottombox over which the top box is also vertically movable, means in thebottom box for compressing the material in the top box, and means formoving the top box and for holding the latter in rigid relation to thetop of the fixed bottom box.

2. In a hydraulic press, the combination with a fixed bottom box, of apress head disposed over theupper extremity of the bottom box, a top boxvertically movable on the head and over the upper extremity of thebottom box, a main ram movable in the bottom box and operative to forcethe material into the to box, and double acting cylinders having pungers provided with piston rods secured to the top box, the top boxbeing held fixed on the upper extremity of the bottom box for aninterval by the plungers and piston rods of the said cylinders, andraised vertically by the plungers and piston rods to leave thecompressed material exposed for removal.

3. In a hydraulic press, the combination with a bottombox, apressheaddisposed over the u per extremity of the bottom box, a top box s idableon the press head and conjunctively opprative with. the upper end of themy hand in presence of two subscribing Witbottom 0X, a cut-off slidemounted in the nesses. top boX a main ram in the bottom box, and doublecting cylinders having plungers pro- THOMAS HENRY MP1) 5 Vided withpiston rodsconnected to the top Witnesses:

box. e HENRY WATOHORNE CLARKE, In testimony whereof I have hereunto setMABEL EUGENIE DE PAUGE.

